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I placed a wee thin mirror, shiny side up at the bottom of the fuel tank.
The main inspection hatch for the tank is immediately above the mirror.
The hatch is of the lever type, and can be opened in seconds.
I shine a flashlight in there, then watch for the dulling of the reflection when I stir up the bottom of the tank with a wee wooden paddle I have.
So far, it has stayed clear, or very nearly so, and that is 12 years on.
If it ever shows too much sign of clouding, I will pump out the floor of the tank through a wee filter or something to collect the crud.
You are warned though, before the fuel tank re-fit in 1998 there was a great big puddle of goo and much in there.... just awful. Like half a bucket ful of puke, really.
Today, I use a pressurised fuel system, pressurised to 5 psi, so fuel leaks out rather than air in.
I have a single Racor filter, a long-serving unit. It has always leaked a tiny wee bit, but I have learned to live with it. It is an engine room, after all, and although it is pretty clean in there I have never tried to make it look like a hospital ward.
Last edited by Rockter; 02-15-2012 at 06:26 PM.